Nader again?

Not long ago I would have said that even if he ran for president again, Ralph Nader could not possibly carry enough votes to be a spoiler, but now I'm not so sure. Obama is in real trouble, but so is his opposition, so 2012 may well be pretty close. In swing states, disgruntled leftists and assorted crackpots who might defect to Nader could be numerous enough to play a deciding role. Which is to say that I agree with everything James Fallows says here. If you, like me, are one of those disgruntled leftists or assorted crackpots, take a long hard look around you, then a long hard look deep inside yourself, and tell me you really could vote for Nader again. Really?